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98 0 98 1 98 2 98 3 98 4 98 5 98 6 98 7 98 8 98 9 99 0 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997

= Free Coordinate    = Occupied(Single Region)     = Occupied (Var Region)     = Center of the grid